复杂断层模型约束反演判识煤层横向变化规律

摘要

If only using horizon information without considering impact from faults , the modeling in fault developed area , seismic con-straint inversion will not achieve satisfactory results .During geological modeling , to use fault information establishes fault model and under its constraining carry out sparse -spike inversion can identify coal seam structures better .Taking a mine area's 2D seismic pros-pecting as an example , chosen a geological section with complicated fault relations , combined with well logging data , started from as-pects of stratigraphic horizon confirmation , fault geological structure framework modeling , field impedance inversion fine quality control etc., acquired geological section of fault constrained sparse -spike inversion.The inversion result has shown that fault model constraint inversion can effectively differentiate coal seam lateral variation status of gradually thinning , pinch out even hiatus .%在断层发育地区建模,若仅利用层位信息,而不考虑断层的影响,其地震约束反演将难以取得令人满意的效果,在地质建模时,利用断层信息建立断层模型,并在其约束下进行稀疏脉冲反演,能够较好的识别煤层结构.以某矿区二维地震为例,选取具有复杂断层关系的地质剖面,结合测井资料,从地质层位的标定、断层地质构造框架模型的建立、波阻抗反演的精细质量控制等方面出发,得出断层约束稀疏脉冲反演的地质剖面.反演结果表明,断层模型约束反演能有效判别煤层在横向上由厚渐薄、尖灭缺失等变化情况.